2D Dual-Metal Zeolitic-Imidazolate-Framework-(ZIF)-Derived Bifunctional Air Electrodes with Ultrahigh Electrochemical Properties for Rechargeable Zinc–Air Batteries

Tingting Wang, Zongkui Kou, Shichun Mu, Jingping Liu, Daping He, Ibrahim Saana Amiinu, Wen Meng, Kui Zhou, Zhixiong Luo, Somboon Chaemchuen, Francis Verpoort

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Abstract

Here first a 2D dual-metal (Co/Zn) and leaf-like zeolitic imidazolate framework (ZIF-L)-pyrolysis approach is reported for the low-cost and facile preparation of Co nanoparticles encapsulated into nitrogen-doped carbon nanotubes (Co-N-CNTs). Importantly, the reasonable Co/Zn molar ratio in the ZIF-L is the key to the emergence of the encapsulated microstructure. Specifically, high-dispersed cobalt nanoparticles are fully encapsulated in the tips of N-CNTs, leading to the full formation of highly active Co–N–C moieties for oxygen reduction and evolution reactions (ORR and OER). As a result, the obtained Co-N-CNTs present superior electrocatalytic activity and stability toward ORR and OER over the commercial Pt/C and IrO2 as well as most reported metal-organic-framework-derived catalysts, respectively. Remarkably, as bifunctional air electrodes of the Zn–air battery, it also shows extraordinary charge–discharge performance. The present concept will provide a guideline for screening novel 2D metal-organic frameworks as precursors to synthesize advanced multifunctional nanomaterials for cross-cutting applications.

Original languageEnglish
Article number1705048
JournalAdvanced Functional Materials
Volume28
Issue number5
DOIs
Publication statusPublished - 31 Jan 2018

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Keywords

  • 2D and leaf-like zeolitic imidazolate frameworks
  • bifunctional air electrodes
  • cobalt–nitrogen–carbon nanotubes
  • rechargeable zinc–air batteries

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Condensed Matter Physics
  • Electrochemistry

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